Remove (unused) Makefile

Committed via https://github.com/asottile/all-repos

Author: asottile

Makefile

@@ -1,5 +1,4 @@
 [tox]
-project = pre_commit_hooks
 # These should match the travis env list
 envlist = py27,py35,py36,pypy
 
@@ -18,10 +17,6 @@ commands =
     pre-commit install -f --install-hooks
     pre-commit run --all-files
 
-[testenv:venv]
-envdir = venv-{[tox]project}
-commands =
-
 [flake8]
 max-line-length=131